What is CVE-2026-4451?

CVE-2026-4451 is a high-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-03-20.

How severe is CVE-2026-4451?

High severity. CVSS v3 base score is 8.8 out of 10.

Improper input validation in Apple macOS

CVE-2026-4451

Insufficient validation of untrusted input in Navigation in Google Chrome prior to 146.0.7680.153 allowed a remote attacker who had compromised the renderer process to potentially perform a sandbox escape via a crafted HTML page. (Chromium security severity: High)

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.003 (16.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

chrome-cve-admin@google.com (Release Notes, Vendor Advisory)
chrome-cve-admin@google.com (Permissions Required, Issue Tracking)

Frequently asked questions

What is CVE-2026-4451?: CVE-2026-4451 is a high-severity vulnerability in Apple macOS, classified under Improper Input Validation. CVSS score: 8.8/10. Published 2026-03-20.
How severe is CVE-2026-4451?: High severity. CVSS v3 base score is 8.8 out of 10.